add windows support

Author: kaaboaye

rustler_tests/native/dynamic_load/src/lib.rs

@@ -1,5 +1,5 @@
 use rustler::Atom;
-use std::{ffi::OsStr, fs::read_to_string, os::unix::prelude::OsStrExt, path::PathBuf};
+use std::{ffi::OsStr, fs::read_to_string, path::PathBuf};
 
 static mut DATASET: Option<Box<str>> = None;
 
@@ -29,12 +29,27 @@ fn load<'a>(env: rustler::Env<'a>, args: rustler::Term<'a>) -> bool {
     let key = Atom::from_str(env, "priv_path").unwrap().to_term(env);
     let priv_path = args.map_get(key).unwrap();
     let priv_path = priv_path.into_binary().unwrap().as_slice();
-    let priv_path = OsStr::from_bytes(priv_path);
-    let asset_path = PathBuf::from(priv_path);
+
+    let asset_path = build_path_buf(priv_path);
 
     initialize_dataset(asset_path);
 
     true
 }
 
+#[cfg(unix)]
+fn build_path_buf(priv_path: &[u8]) -> PathBuf {
+    use std::os::unix::prelude::OsStrExt;
+
+    let priv_path = OsStr::from_bytes(priv_path);
+    PathBuf::from(priv_path)
+}
+
+#[cfg(windows)]
+fn build_path_buf(priv_path: &[u8]) -> PathBuf {
+    let string_slice = std::str::from_utf8(priv_path).expect("Data is not valid UTF-8, we could decode it without valid UTF-8 requirements but lets not do that for now because its easier this way");
+    let priv_path = OsStr::new(string_slice);
+    PathBuf::from(priv_path)
+}
+
 rustler::init!("Elixir.DynamicData", [get_dataset], load = load);